virtual hosting,

 
i had to reinstall my mt4 platform, how do i put the virtual server back onto my live account.
 
MQL5 VPS?
This VPS is per trading account.
So, connect your Metatrader to the trading account (trading account which is related to VPS subscription: https://www.mql5.com/en/vps/subscriptions), fill Community tab with your forum login and forum password (not by your email), and you will see your VPS.